Fuel cell and vehicle

Abstract

The utility model relates to the technical field of fuel cells, and provides a fuel cell and a vehicle, the fuel cell comprises a shell, an exhaust valve and a fuel cell stack arranged in the shell, the top surface of the shell is provided with a convex part, and the convex part forms a first gas collection cavity communicated with the inner cavity of the shell; the cross sectional area of the first gas collection cavity is gradually reduced from one end close to the top surface to one end away from the top surface; the exhaust valve is connected to the end, deviating from the top face, of the first gas collection cavity. According to the fuel cell provided by the embodiment of the utility model, the convex part is formed on the top surface of the shell, so that hydrogen leaked during working of the fuel cell stack is gathered at the first gas collecting cavity formed by the convex part, and the cross sectional area of the first gas collecting cavity is gradually reduced from one end close to the top surface to one end deviating from the top surface; the hydrogen can conveniently flow to the top of the first gas collection cavity from bottom to top along the first gas collection cavity, so that the collected hydrogen is discharged through the exhaust valve at the top of the first gas collection cavity, and the safety of the fuel cell stack is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell and a vehicle. Background Art

[0002] Today, the world is facing energy shortages and is actively seeking an emerging energy source that can replace fossil fuels. Fuel cells are considered to be the fourth generation of power generation technology after hydropower, thermal power and atomic power generation. Fuel cells convert chemical energy into electrical energy through chemical reactions. It is an efficient, safe, clean and flexible power generation technology. Among them, hydrogen fuel cell systems are considered to have broad application prospects due to their high efficiency, high energy density, low reaction temperature, no noise and no pollution.

[0003] In the prior art, the fuel cell stack is the core component of the hydrogen fuel cell system. The fuel cell stack is assembled from multiple sub-battery units. The multiple sub-battery units have flow channels for hydrogen, air, and cooling water. Different sub-battery units are sealed using sealing strips or injection molding structures.

[0004] However, under normal operation of the fuel cell stack, a certain amount of hydrogen leakage is inevitable, and the leaked hydrogen is likely to cause safety hazards. Utility Model Content

[0005] The utility model provides a fuel cell and a vehicle, which are used to solve the defect in the prior art that leaked hydrogen easily causes potential safety hazards.

[0006] The utility model provides a fuel cell, comprising a shell, an exhaust valve and a fuel cell stack arranged in the shell, the top surface of the shell has a convex portion, the convex portion forms a first gas collecting cavity connected to the inner cavity of the shell, the cross-sectional area of ​​the first gas collecting cavity gradually decreases from an end close to the top surface to an end away from the top surface; the exhaust valve is connected to the end of the first gas collecting cavity away from the top surface.

[0007] According to a fuel cell provided by the utility model, the convex portion is an arc-shaped convex portion, a triangular convex portion, or a trapezoidal convex portion.

[0008] According to a fuel cell provided by the utility model, the top surface of the shell has at least one second gas collecting cavity communicated with the inner cavity of the shell, and all the second gas collecting cavities are communicated with the first gas collecting cavity.

[0009] According to a fuel cell provided by the utility model, an end of the first gas collecting chamber away from the top surface is connected to an air duct, the exhaust valve is arranged on the air duct, and the height of the air duct gradually increases from an end close to the first gas collecting chamber to an end away from the first gas collecting chamber.

[0010] According to a fuel cell provided by the utility model, the shell is provided with a hydrogen concentration sensor.

[0011] A fuel cell provided by the utility model further includes an air intake pipe connected to the shell, and the air intake pipe is provided with an air intake valve.

[0012] A fuel cell provided according to the utility model further includes a controller, wherein the controller is connected to the exhaust valve, the intake valve and the hydrogen concentration sensor.

[0013] A fuel cell provided by the utility model further includes a warning light or an alarm connected to the controller.

[0014] A fuel cell provided by the utility model further includes a hydrogen recovery mechanism connected to the end of the air guide tube away from the first gas collecting chamber.

[0015] The utility model also provides a vehicle, comprising a conveying mechanism and any one of the above-mentioned fuel cells, wherein the housing is arranged on the conveying mechanism.

[0016] The fuel cell provided by the embodiment of the utility model forms a convex portion on the top surface of the shell so that hydrogen leaked from the fuel cell stack during operation is collected in the first gas collecting chamber formed by the convex portion, and the cross-sectional area of ​​the first gas collecting chamber gradually decreases from one end close to the top surface to the end away from the top surface, so as to facilitate the hydrogen to flow from bottom to top along the first gas collecting chamber to the top of the first gas collecting chamber, so as to discharge the collected hydrogen through the exhaust valve on the top of the first gas collecting chamber, thereby ensuring the safety of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the fuel cell provided by the utility model.

[0019] Figure 2 It is a structural schematic diagram of a fuel cell stack provided by the utility model.

[0020] Figure numerals: 1. Shell; 11. Protrusion; 12. First gas collecting cavity; 21. Exhaust valve; 22. Air guide pipe; 3. Fuel cell stack; 31. End plate; 32. Collecting plate; 33. Single cell; 4. Hydrogen concentration sensor; 51. Intake pipe; 52. Intake valve. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] Combine the following Figure 1-Figure 2 A fuel cell according to an embodiment of the present invention is described.

[0027] The embodiment of the first aspect of the utility model provides a fuel cell, Figure 1 The schematic diagram of the structure of the fuel cell provided by the embodiment of the utility model is illustrated as follows: Figure 1 As shown, the fuel cell includes a shell 1, an exhaust valve 21 and a fuel cell stack 3 arranged in the shell 1; the top surface of the shell 1 has a convex portion 11, the convex portion 11 forms a first gas collecting cavity 12 connected to the inner cavity of the shell 1, and the cross-sectional area of ​​the first gas collecting cavity 12 gradually decreases from one end close to the top surface to the end away from the top surface; the exhaust valve 21 is connected to the end of the first gas collecting cavity 12 away from the top surface.

[0028] It can be understood that a shell 1 is set on the outside of the fuel cell stack 3 to provide protection and structural support for the fuel cell stack 3. The shell 1 is used to isolate the fuel cell stack 3 from the external environment, keep the fuel cell stack 3 clean, and not be affected by conductive dust, etc., thereby avoiding the risk of insulation failure of the fuel cell stack 3 caused by conductive dust or conductive liquid.

[0029] It should be noted that in order to avoid the influence of impurities such as conductive dust or conductive liquid on the fuel cell stack 3, a protective shell 1 is set outside the fuel cell stack 3, and the protective shell 1 set outside the fuel cell stack 3 will cause the hydrogen released by the core to gather in the shell 1, causing safety risks. Therefore, the utility model forms a convex portion 11 on the top surface of the shell 1, and the hydrogen in the shell 1 is gathered at the first gas collection cavity 12 formed by the convex portion 11, and the cross-sectional area of ​​the first gas collection cavity 12 gradually decreases from one end close to the top surface to the end away from the top surface, so that the hydrogen flows from the bottom to the top of the first gas collection cavity 12 along the cavity wall of the first gas collection cavity 12, and the hydrogen gathered in the first gas collection cavity 12 is discharged through the exhaust valve 21 connected to the top of the first gas collection cavity 12, so as to ensure the safety of the fuel cell stack 3 and avoid the potential safety hazards caused by the accumulation of leaked hydrogen in the shell 1.

[0030] The fuel cell provided by the embodiment of the utility model forms a convex portion 11 on the top surface of the shell 1, so that the hydrogen leaked from the fuel cell stack 3 during operation is collected in the first gas collecting chamber 12 formed by the convex portion 11, and the cross-sectional area of ​​the first gas collecting chamber 12 gradually decreases from one end close to the top surface to the end away from the top surface, so that the hydrogen can flow from the bottom to the top of the first gas collecting chamber 12, so as to discharge the collected hydrogen through the exhaust valve 21 on the top of the first gas collecting chamber 12, thereby ensuring the safety of the fuel cell stack 3.

[0031] Furthermore, the fuel cell provided in the embodiment of the utility model realizes passive hydrogen discharge by opening the exhaust valve 21 , does not require external energy, and improves the fuel utilization rate of the fuel cell stack 3 .

[0032] In one embodiment of the present invention, Figure 2 The schematic diagram of the structure of the fuel cell stack 3 provided by the utility model is illustrated as follows: Figure 2 As shown, the fuel cell stack 3 includes two end plates 31, two current collecting plates 32 and a plurality of single cells 33. The plurality of single cells 33 are arranged side by side between the two current collecting plates 32, and the two end plates 31 are arranged on the opposite sides of the two current collecting plates 32. The current collecting plate 32 has the function of collecting the current of the fuel cell stack 3, and assumes the positive or negative output function of the fuel cell stack 3; the end plate 31 is responsible for the distribution of the three media of hydrogen, air and cooling water of the fuel cell stack, and the function of providing pressure to the single cell 33. The single cell 33 is the core component of the fuel cell stack 3, has the flow channel of hydrogen, air and cooling water, and assumes the function of generating electric energy. Here, the single cell 33 also includes the single cell technology route assembled by the bipolar plate and the membrane electrode. The single cells 33 are sealed by the compression of the seal, and the internal plates and the membrane electrode of the single cell 33 are also sealed by the seal. In this embodiment, the material of the seal is EPDM rubber.

[0033] It should be noted that during the use of the fuel cell stack 3, the internal pressure increases when it is working and decreases when it is not working. In addition, working conditions such as thermal expansion and contraction, vibration and impact will cause fatigue of the seals, resulting in leakage and even explosion risks. In this embodiment, a convex portion 11 and an exhaust valve 21 connected to the convex portion 11 are formed on the upper part of the shell 1 to realize a hydrogen discharge design to avoid the explosion risk caused by hydrogen accumulation.

[0034] In one embodiment of the utility model, the protrusion 11 on the top surface of the shell 1 may include but is not limited to an arc-shaped protrusion, a triangular protrusion, or a trapezoidal protrusion, and correspondingly, the cross-section of the protrusion 11 is arc-shaped, triangular, or trapezoidal; of course, the protrusion 11 may also be an irregular shape, such as a bridge hole, as long as the cross-section of the protrusion 11 gradually decreases from one end close to the top surface to the end away from the top surface.

[0035] Optionally, the top surface of the shell 1 is a quadrilateral, and the protrusion 11 is a through protrusion that penetrates along the length direction of the top surface. Of course, the protrusion 11 can also be a through protrusion that penetrates along the width direction of the top surface.

[0036] Furthermore, the convex portion 11 may be arranged in the middle of the top surface. Of course, the top surface as a whole may bulge away from the bottom surface of the housing 1 so that the convex portion 11 is formed on the top surface as a whole.

[0037] In this embodiment, a convex portion 11 is provided in the middle of the top surface of the housing 1 , and the convex portion 11 is semicircular.

[0038] In one embodiment of the present invention, the top surface of the shell 1 has at least one second gas collecting cavity connected to the inner cavity of the shell 1 , and all the second gas collecting cavities are connected to the first gas collecting cavity 12 .

[0039] It can be understood that in order to facilitate the collection of hydrogen in the shell 1, a second gas collecting chamber is also provided on the top surface of the shell 1, and the cross-sectional area of ​​the second gas collecting chamber gradually decreases from one end close to the top surface to the end away from the top surface. The structure of the second gas collecting chamber may be the same as or different from the structure of the first gas collecting chamber 12.

[0040] For example, the top surface of the shell 1 has a first gas collecting cavity 12 and a second gas collecting cavity arranged side by side along the length direction or the width direction of the top surface, the first gas collecting cavity 12 is located in the middle of the top surface of the shell 1, and when there are multiple second gas collecting cavities, they are respectively located on both sides of the first gas collecting cavity 12, and the connection between the second gas collecting cavity and the first gas collecting cavity 12 can be a through hole opened on the top surface, and the through hole serves as a hydrogen channel between the second gas collecting cavity and the first gas collecting cavity 12, so that the hydrogen in the second gas collecting cavity flows to the first gas collecting cavity 12 through the hydrogen channel.

[0041] It should be noted that the hydrogen in the shell 1 is transferred to the second gas collecting chamber, and the hydrogen in the second gas collecting chamber is then collected to the first gas collecting chamber 12 through the hydrogen channel, so that the hydrogen in the shell 1 is collected through the second gas collecting chamber and the first gas collecting chamber 12, thereby improving the collection efficiency of the hydrogen in the shell 1.

[0042] It should be noted that when the fuel cell stack 3 is in working or storage state, the first gas collecting chamber 12 is at the highest point of the shell 1. If the top surface of the shell 1 is uneven, a groove will be formed at the uneven position of the top surface, and the groove can be used as the second gas collecting chamber. The second gas collecting chambers at the uneven position of the top surface of the shell 1 are connected to the first gas collecting chamber 12, and the hydrogen gathered in the second gas collecting chamber can be transferred to the second gas collecting chamber under gravity.

[0043] According to the embodiment of the utility model, the protection requirement of the housing 1 for the fuel cell stack 3 reaches IP76 level. For example, at present, when the 150kW fuel cell stack 3 of the bipolar plate technical solution is stored in a hydrogen-rich state after operation, the hydrogen concentration in the core gap of the housing 1 can reach 3000ppm, and the hydrogen in the housing 1 is quickly collected by the second gas collecting cavity and the first gas collecting cavity 12, and discharged when the exhaust valve 21 is opened, so as to ensure the safety of the fuel cell stack 3.

[0044] In one embodiment of the present invention, an end of the first gas collecting cavity 12 away from the top surface is connected to an air duct 22, and the exhaust valve 21 is arranged on the air duct 22. The height of the air duct 22 gradually increases from the end close to the first gas collecting cavity 12 to the end away from the first gas collecting cavity 12.

[0045] It can be understood that the top of the protrusion 11 is connected to an air duct 22. The air duct 22 is required to be made of hydrogen-resistant material and ensure that during the arrangement of the air duct 22, the height of the rear end of each part is higher than the front end, so that the hydrogen can move outward under the action of gravity, so as to quickly discharge the hydrogen collected in the first gas collecting cavity 12 and prevent the hydrogen in the air duct 22 from flowing back to the first gas collecting cavity 12.

[0046] In one embodiment of the utility model, a hydrogen concentration sensor 4 is provided on the shell 1, and the hydrogen amount (hydrogen concentration) in the shell 1 is detected by the hydrogen concentration sensor 4. When the hydrogen concentration sensor 4 detects that the hydrogen concentration in the shell 1 is greater than a preset threshold value, the exhaust valve 21 is opened to discharge the hydrogen in the shell 1.

[0047] Optionally, hydrogen leaked from the fuel cell stack 3 is driven by its own density to gather upward to the first collecting chamber 12 under the condition of gravity. The hydrogen concentration sensor 4 can be set on the upper part of the shell 1 or the first collecting chamber 12 to detect the amount of hydrogen collected. When the amount of hydrogen collected exceeds a preset threshold, the hydrogen collected in the first collecting chamber 12 is discharged.

[0048] Furthermore, the fuel cell of this embodiment further includes an air intake pipe 51 connected to the housing 1 , and the air intake pipe 51 is provided with an air intake valve 52 .

[0049] It is understandable that when the hydrogen collected in the first gas collecting chamber 12 exceeds a preset threshold, the air intake valve 52 is opened to allow air to flow into the shell 1, so that the hydrogen in the upper first gas collecting chamber 12 is quickly discharged.

[0050] For example, the air intake pipe 51 is connected to the side of the upper part of the shell 1, and the air intake pipe 51 is communicated with the inner cavity of the shell 1. When it is necessary to discharge the hydrogen in the first gas collecting cavity 12, the air intake valve 52 and the exhaust valve 21 can be opened at the same time to realize the rapid discharge of the hydrogen in the first gas collecting cavity 12. Of course, the air intake valve 52 can be opened first, and then the exhaust valve 21 can be opened to discharge the hydrogen in the first gas collecting cavity 12.

[0051] In this embodiment, the air guide pipe 22, the exhaust valve 21, the air intake pipe 51, and the air intake valve 52 are all made of hydrogen resistant materials. It should be noted that in other embodiments, all parts that can be contacted by hydrogen are made of hydrogen resistant materials, that is, hydrogen embrittlement-resistant materials.

[0052] Furthermore, the fuel cell of this embodiment further includes a controller, which is connected to the exhaust valve 21, the intake valve 52 and the hydrogen concentration sensor 4 respectively.

[0053] The exhaust valve 21 controls the opening and closing of the air guide pipe 22, and needs to be made of hydrogen-resistant materials. At the same time, the exhaust valve 21 can be controlled by a controller. The exhaust valve 21 has two control modes: mechanical opening and closing and controller opening and closing.

[0054] It can be understood that the hydrogen concentration sensor 4 measures the hydrogen concentration in the shell 1, the controller obtains the hydrogen concentration of the hydrogen concentration sensor 4, and compares the hydrogen concentration with a preset threshold value. When the hydrogen concentration is greater than the preset threshold value, the controller controls the exhaust valve 21 and the intake valve 52 to open, and discharges the hydrogen collected in the first collecting chamber 12 in the dischargeable area.

[0055] In a preferred embodiment of the present invention, the fuel cell further comprises a hydrogen recovery mechanism connected to the end of the air duct 22 away from the first gas collecting chamber 12, and the hydrogen discharged from the exhaust pipe is recovered by the hydrogen recovery mechanism to achieve hydrogen recycling.

[0056] In a preferred embodiment of the present invention, the fuel cell further comprises a warning light connected to the controller.

[0057] It is understandable that when the controller detects that the hydrogen concentration measured by the hydrogen concentration sensor 4 is greater than the preset threshold value, the controller sends a control instruction to the warning light to control the warning light to light up, thereby warning the housing 1 through the warning light that the concentration of hydrogen collected in the housing 1 is too high and the collected hydrogen needs to be discharged in time. Of course, when the warning light is on, the exhaust valve 21 is opened to discharge hydrogen, and the warning light is on to indicate that it is currently in the hydrogen discharge working state.

[0058] It should be noted that the controller can also be connected to an alarm, which has the same warning function as the warning light. Of course, the warning light and the alarm can also serve as a fault warning to further improve the safety of the fuel cell.

[0059] An embodiment of the second aspect of the utility model provides a vehicle, which includes a conveying mechanism and a fuel cell provided by any of the above embodiments, wherein the fuel cell is provided with a lower conveying mechanism.

[0060] It can be understood that the housing 1 of the fuel cell is arranged on a conveying mechanism, and the fuel cell can be transported to a safe area through the conveying mechanism to discharge hydrogen into the safe area where discharge is allowed.

[0061] In an exemplary embodiment of the utility model, a vehicle includes a conveying mechanism and a fuel cell, and the fuel cell includes a housing 1, an exhaust valve 21, and a fuel cell stack 3 disposed in the housing 1. A gas collecting tank for collecting hydrogen is designed on the upper part of the housing 1, and the gas collecting tank serves as a convex portion 11. Hydrogen leaked from the fuel cell stack 3 will be driven by its own density to collect in the gas collecting tank under the condition of gravity. An air guide 22 is provided at the highest point of the gas collecting tank, and an exhaust valve 21 is provided on the air guide 22. When the exhaust valve 21 is opened, the hydrogen collected in the gas collecting tank can be discharged to ensure the safety of the fuel cell stack 3.

[0062] When the controller is connected to the vehicle control, it can receive the sensor signal of the vehicle or the signal of the vehicle controller to ensure that within the safe area, the controller controls the exhaust valve 21 to open and discharge the hydrogen within the area where emission is allowed.

[0063] It should be noted that after the vehicle has been stationary for a period of time after operation, after the vehicle is powered on, the sensor recognizes that the vehicle is outdoors and in an area where hydrogen emission can be accepted, and controls the exhaust valve 21 to open, and discharges the hydrogen collected in the shell 1 to the outside. Or during the operation of the fuel cell stack 3, when it is detected that the concentration of hydrogen collected in the shell 1 is greater than a preset threshold, the exhaust valve 21 is controlled to open, and the hydrogen in the shell 1 is discharged outdoors where emission is allowed.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A fuel cell, characterized in that: include: A shell (1), wherein the top surface of the shell (1) has a convex portion (11), the convex portion (11) forms a first gas collecting cavity (12) communicating with the inner cavity of the shell (1), and the cross-sectional area of ​​the first gas collecting cavity (12) gradually decreases from an end close to the top surface to an end away from the top surface; an exhaust valve (21), connected to an end of the first gas collecting chamber (12) away from the top surface; A fuel cell stack (3) is arranged in the housing (1).

2. The fuel cell according to claim 1, characterized in that The cross section of the convex portion (11) is an arc-shaped convex portion, a triangular convex portion, or a trapezoidal convex portion.

3. The fuel cell according to claim 1, characterized in that The top surface of the shell (1) has at least one second gas collecting cavity connected to the inner cavity of the shell (1), and all the second gas collecting cavities are connected to the first gas collecting cavity (12).

4. The fuel cell according to any one of claims 1 to 3, characterized in that: An end of the first gas collecting cavity (12) facing away from the top surface is connected to an air guide pipe (22), the exhaust valve (21) is arranged on the air guide pipe (22), and the height of the air guide pipe (22) gradually increases from an end close to the first gas collecting cavity (12) to an end facing away from the first gas collecting cavity (12).

5. The fuel cell according to claim 4, characterized in that The housing (1) is provided with a hydrogen concentration sensor (4).

6. The fuel cell according to claim 5, characterized in that It also comprises an air intake pipe (51) connected to the housing (1), wherein the air intake pipe (51) is provided with an air intake valve (52).

7. The fuel cell according to claim 6, characterized in that It also includes a controller, which is connected to the exhaust valve (21), the intake valve (52) and the hydrogen concentration sensor (4).

8. The fuel cell according to claim 7, characterized in that: Also included is a warning light or an alarm connected to the controller.

9. The fuel cell according to claim 4, characterized in that: It also comprises a hydrogen recovery mechanism connected to the end of the air guide pipe (22) away from the first gas collecting chamber (12).

10. A vehicle, characterized in that: It comprises a conveying mechanism and a fuel cell as claimed in any one of claims 1 to 9, wherein the housing (1) is arranged on the conveying mechanism.

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